US20100084982A1 - Operating device and method for the combined operation of gas discharge lamps and semiconductor light sources - Google Patents
Operating device and method for the combined operation of gas discharge lamps and semiconductor light sources Download PDFInfo
- Publication number
- US20100084982A1 US20100084982A1 US12/532,151 US53215108A US2010084982A1 US 20100084982 A1 US20100084982 A1 US 20100084982A1 US 53215108 A US53215108 A US 53215108A US 2010084982 A1 US2010084982 A1 US 2010084982A1
- Authority
- US
- United States
- Prior art keywords
- light source
- semiconductor light
- gas discharge
- discharge lamp
- operating device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims description 5
- 239000003086 colorant Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 20
- 230000007704 transition Effects 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007630 basic procedure Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B35/00—Electric light sources using a combination of different types of light generation
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Definitions
- the invention relates to the field of dimmable operating devices for light sources, specifically to dimmable operating devices for the combined operation of gas discharge lamps and semiconductor light sources.
- the invention is based on dimmable operating devices for the combined operation of gas discharge lamps and semiconductor light sources in accordance with the precharacterizing clause of the main claim.
- each light source has been considered individually in the case of luminaires which also use semiconductor light sources such as light-emitting diodes in addition to the gas discharge lamps which have long been used.
- each light source can be dimmed individually, but both light sources are not considered to be one unit.
- U.S. Pat. No. 7,052,157 B1 has disclosed a luminaire in which LEDs are also used in addition to compact fluorescent lamps.
- the light sources can be dimmed independently of one another.
- a common dimming mechanism in which both types of light source are used is not described here.
- fluorescent lamps can be dimmed with a corresponding degree of technical complexity down to 1% of the nominal light, the efficiency is reduced considerably at these low dimming settings.
- the color locus of the emitted light can also change since, at very low powers, the lamp cools down to a significant extent and it gives more weight to the argon discharge in comparison with the mercury discharge.
- a light source which can be dimmed more effectively, such as a semiconductor light source, for example, for very low dimming settings.
- a semiconductor light source for example, for very low dimming settings.
- the object of the invention is to provide a dimmable operating device for the combined operation of gas discharge lamps and semiconductor light sources which includes common dimming control for both light sources, by means of which dimming control the light emitted by the light-emitting means of the operating device can be dimmed down from a nominal luminous intensity to 1% or less.
- the operating device includes circuits which can operate both light-emitting means with dimming.
- An input which can represent an interface to an analog or digital light control bus is provided for the dimming control.
- a 1-10 V bus is generally used as the analog bus, and the DALI protocol is usually used as the digital interface.
- the digital interface also identifies light control commands and light scenarios which are stored in the operating device. If a signal is input to this input, the operating device controls the light emission of the two light sources corresponding to the input dimming level.
- one light-emitting means or the other is used, depending on the dimming level, and internal control ensures that the transition from one light-emitting means to the other is hidden from the human eye.
- Both light-emitting means are used for a certain dimming range in order to be able to realize a very soft transition.
- FIG. 1 shows a schematic illustration of a hybrid system according to the invention.
- FIG. 2 shows a graph illustrating the transition from the semiconductor light sources to the gas discharge lamps.
- FIG. 3 shows a graph illustrating a further changeover criterion: the specific efficiency of the light sources.
- FIG. 1 shows a schematic connection diagram of an operating device according to the invention.
- the device has outputs for gas discharge lamps and for semiconductor light sources.
- the gas discharge lamps are preferably compact fluorescent lamps, and the semiconductor light sources can be, for example, LEDs or OLEDs emitting white light. It is naturally also possible for only one gas discharge lamp and one semiconductor light source or one gas discharge lamp and a plurality of semiconductor light sources to be used.
- a light control interface can be a digital or an analog interface. However, it is also possible to program the interface to one light control protocol or another. This has the advantage of the greatest possible versatility of the operating device.
- the two different light sources should be positioned in the luminaire in such a way that the light distribution of the two light-emitting means is similar. Only in this way can the luminaire be dimmed in a wide range without any physical optical discrepancies.
- FIG. 2 shows a graph illustrating the basic procedure in the transition from the LEDs to the gas discharge lamps.
- the dimming setting of a light control signal over overall brightness is shown.
- Both types of light source operated by the device are driven via a light control signal.
- the two curves for the semiconductor light sources and the gas discharge lamps run over large ranges on the light control signal, i.e. in all ranges outside the dimming range of 3%-10%, in each case the light emission of the semiconductor light sources or the gas discharge lamps precisely follows the prescribed value of the light control signal.
- the light control signal ends at the lower and upper ends since there is no longer any correlation between the signal and the brightness. In the range between 3% and 10%, both types of light source contribute to the system light emission. In this case, the light sources are each dimmed in such a way that the overall luminous intensity corresponds to the prescribed value of the light control signal.
- the LEDs or OLEDs emit light in the lower dimming range, for example from 1% to 10%.
- the gas discharge lamps are additionally connected.
- the luminous efficiency of the LEDs is reduced suddenly in order not to change the overall luminous intensity of the luminaire.
- both light-emitting means are run up successively in terms of their luminous efficiency.
- the dimming setting of 10% the LEDs are disconnected and the power of the gas discharge lamp is increased suddenly in order again to maintain the quantity of light emitted. From this point on, the gas discharge lamp is dimmed down to its rated power.
- the transition between the two categories of light-emitting means can therefore become visible despite the same brightness. This is primarily the case if the luminaire has been operated for a relatively long period of time in the lower dimming range, in which the gas discharge lamp is dimmed to a significant degree or entirely switched off. The lamp then cools down and changes its color or is cooled down at the start to such an extent that it emits a slightly different color than during nominal light operation.
- the operating device in the second embodiment therefore has outputs for light-emitting diodes of different colors. There are preferably three outputs for diodes emitting colored light. These diodes can then emit red, green and blue light, and the light of all of the semiconductor light sources can thus be matched to the light color of the gas discharge lamp.
- a family of characteristics which describes the dependence of the temperature of the gas discharge lamp as a function of the dimming setting, the time and the color locus can be stored in the operating device.
- the operating device sets the color locus of the semiconductor light sources which emit light of different colors to the color locus of the gas discharge lamp.
- the semiconductor light sources can naturally be organized in groups, with the result that a plurality of semiconductor light sources are also provided for each color.
- Another possibility consists in using a sensor for the overall brightness and the color locus and controlling the lamps in such a way that the values for the individual brightnesses, for the overall brightness and for the two color loci of the different light sources can be measured and adjusted.
- the measurements need to be conducted when only the light-emitting means to be measured is switched on. This is relatively simple in the lower dimming range since the light sources are driven by pulses and there are therefore always times at which only the light-emitting means to be measured is emitting light. If no suitable time results from the driving, the control of the operating device can switch off all of the light-emitting means which are not to be measured for a measurement. Since this period of time is very short, it cannot be perceived by the human eye.
Abstract
Description
- The invention relates to the field of dimmable operating devices for light sources, specifically to dimmable operating devices for the combined operation of gas discharge lamps and semiconductor light sources.
- The invention is based on dimmable operating devices for the combined operation of gas discharge lamps and semiconductor light sources in accordance with the precharacterizing clause of the main claim. Until now, each light source has been considered individually in the case of luminaires which also use semiconductor light sources such as light-emitting diodes in addition to the gas discharge lamps which have long been used. In the case of dimmable luminaires, each light source can be dimmed individually, but both light sources are not considered to be one unit.
- U.S. Pat. No. 7,052,157 B1 has disclosed a luminaire in which LEDs are also used in addition to compact fluorescent lamps. The light sources can be dimmed independently of one another. A common dimming mechanism in which both types of light source are used is not described here.
- Although fluorescent lamps can be dimmed with a corresponding degree of technical complexity down to 1% of the nominal light, the efficiency is reduced considerably at these low dimming settings. The color locus of the emitted light can also change since, at very low powers, the lamp cools down to a significant extent and it gives more weight to the argon discharge in comparison with the mercury discharge.
- It is therefore desirable to provide a light source which can be dimmed more effectively, such as a semiconductor light source, for example, for very low dimming settings. In order to keep the complexity of the driving of the two light sources low, it is expedient to operate both light sources using one operating device.
- The object of the invention is to provide a dimmable operating device for the combined operation of gas discharge lamps and semiconductor light sources which includes common dimming control for both light sources, by means of which dimming control the light emitted by the light-emitting means of the operating device can be dimmed down from a nominal luminous intensity to 1% or less.
- The object is achieved according to the invention by the features of
apparatus claim 1 andmethod claim 10. - Advantageous developments of the invention are given in the dependent claims.
- For this purpose the operating device includes circuits which can operate both light-emitting means with dimming. An input which can represent an interface to an analog or digital light control bus is provided for the dimming control. A 1-10 V bus is generally used as the analog bus, and the DALI protocol is usually used as the digital interface. The digital interface also identifies light control commands and light scenarios which are stored in the operating device. If a signal is input to this input, the operating device controls the light emission of the two light sources corresponding to the input dimming level.
- In this case, one light-emitting means or the other is used, depending on the dimming level, and internal control ensures that the transition from one light-emitting means to the other is hidden from the human eye. Both light-emitting means are used for a certain dimming range in order to be able to realize a very soft transition.
-
FIG. 1 shows a schematic illustration of a hybrid system according to the invention. -
FIG. 2 shows a graph illustrating the transition from the semiconductor light sources to the gas discharge lamps. -
FIG. 3 shows a graph illustrating a further changeover criterion: the specific efficiency of the light sources. -
FIG. 1 shows a schematic connection diagram of an operating device according to the invention. The device has outputs for gas discharge lamps and for semiconductor light sources. The gas discharge lamps are preferably compact fluorescent lamps, and the semiconductor light sources can be, for example, LEDs or OLEDs emitting white light. It is naturally also possible for only one gas discharge lamp and one semiconductor light source or one gas discharge lamp and a plurality of semiconductor light sources to be used. In addition to the system voltage input, there is an input for a light control interface. This light control interface can be a digital or an analog interface. However, it is also possible to program the interface to one light control protocol or another. This has the advantage of the greatest possible versatility of the operating device. - The two different light sources should be positioned in the luminaire in such a way that the light distribution of the two light-emitting means is similar. Only in this way can the luminaire be dimmed in a wide range without any physical optical discrepancies.
-
FIG. 2 shows a graph illustrating the basic procedure in the transition from the LEDs to the gas discharge lamps. The dimming setting of a light control signal over overall brightness is shown. Both types of light source operated by the device are driven via a light control signal. The two curves for the semiconductor light sources and the gas discharge lamps run over large ranges on the light control signal, i.e. in all ranges outside the dimming range of 3%-10%, in each case the light emission of the semiconductor light sources or the gas discharge lamps precisely follows the prescribed value of the light control signal. The light control signal ends at the lower and upper ends since there is no longer any correlation between the signal and the brightness. In the range between 3% and 10%, both types of light source contribute to the system light emission. In this case, the light sources are each dimmed in such a way that the overall luminous intensity corresponds to the prescribed value of the light control signal. - The LEDs or OLEDs emit light in the lower dimming range, for example from 1% to 10%. Above a dimming setting of 3%, the gas discharge lamps are additionally connected. At the time of starting of the lamps, simultaneously the luminous efficiency of the LEDs is reduced suddenly in order not to change the overall luminous intensity of the luminaire. In order to compensate as well as possible for the short flash of light from the gas discharge lamp which it emits during starting, it would also be conceivable to entirely disconnect the LEDs for the instant of lamp starting. In the range between 3% and 10%, both light-emitting means are run up successively in terms of their luminous efficiency. At the dimming setting of 10%, the LEDs are disconnected and the power of the gas discharge lamp is increased suddenly in order again to maintain the quantity of light emitted. From this point on, the gas discharge lamp is dimmed down to its rated power.
- These measures ensure that the transitions between the categories of light-emitting means can barely be perceived by the human eye. However, there is still a problem as regards the color locus of the emitted light. Although fluorescent lamps have a defined color locus at a rated power, this can change depending on the dimming state. Primarily at low dimming settings the lamp cools down. This results in the mercury discharge dropping off since the mercury condenses out at cool points on the lamp and is therefore no longer available for the discharge. However, the proportion of argon discharge therefore increases, which results in a migration of the color locus into the red.
- The transition between the two categories of light-emitting means can therefore become visible despite the same brightness. This is primarily the case if the luminaire has been operated for a relatively long period of time in the lower dimming range, in which the gas discharge lamp is dimmed to a significant degree or entirely switched off. The lamp then cools down and changes its color or is cooled down at the start to such an extent that it emits a slightly different color than during nominal light operation.
- The operating device in the second embodiment therefore has outputs for light-emitting diodes of different colors. There are preferably three outputs for diodes emitting colored light. These diodes can then emit red, green and blue light, and the light of all of the semiconductor light sources can thus be matched to the light color of the gas discharge lamp.
- For this purpose, a family of characteristics which describes the dependence of the temperature of the gas discharge lamp as a function of the dimming setting, the time and the color locus can be stored in the operating device. At low dimming settings at which the semiconductor light sources are switched on, the operating device then sets the color locus of the semiconductor light sources which emit light of different colors to the color locus of the gas discharge lamp. The semiconductor light sources can naturally be organized in groups, with the result that a plurality of semiconductor light sources are also provided for each color.
- Another possibility consists in using a sensor for the overall brightness and the color locus and controlling the lamps in such a way that the values for the individual brightnesses, for the overall brightness and for the two color loci of the different light sources can be measured and adjusted. For this purpose, the measurements need to be conducted when only the light-emitting means to be measured is switched on. This is relatively simple in the lower dimming range since the light sources are driven by pulses and there are therefore always times at which only the light-emitting means to be measured is emitting light. If no suitable time results from the driving, the control of the operating device can switch off all of the light-emitting means which are not to be measured for a measurement. Since this period of time is very short, it cannot be perceived by the human eye.
Claims (11)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007013742 | 2007-03-22 | ||
DE102007013742A DE102007013742A1 (en) | 2007-03-22 | 2007-03-22 | Operating device and method for the combined operation of gas discharge lamps and semiconductor light sources |
DE102007013742.9 | 2007-03-22 | ||
PCT/EP2008/052290 WO2008113658A1 (en) | 2007-03-22 | 2008-02-26 | Operating device and method for the combined operation of gas discharge lamps and semiconductor light sources |
Publications (2)
Publication Number | Publication Date |
---|---|
US20100084982A1 true US20100084982A1 (en) | 2010-04-08 |
US8502458B2 US8502458B2 (en) | 2013-08-06 |
Family
ID=39529760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/532,151 Expired - Fee Related US8502458B2 (en) | 2007-03-22 | 2008-02-26 | Operating device and method for the combined operation of gas discharge lamps and semiconductor light sources |
Country Status (9)
Country | Link |
---|---|
US (1) | US8502458B2 (en) |
EP (1) | EP2138012B8 (en) |
JP (1) | JP5200036B2 (en) |
KR (1) | KR20090125835A (en) |
CN (1) | CN101622908B (en) |
AT (1) | ATE522120T1 (en) |
DE (1) | DE102007013742A1 (en) |
TW (1) | TWI446837B (en) |
WO (1) | WO2008113658A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8232744B2 (en) * | 2008-01-23 | 2012-07-31 | Osram Ag | Method for the operation of and circuit arrangement for light sources |
DE102008057007A1 (en) * | 2008-11-12 | 2010-05-20 | HÜCO Lightronic GmbH | Electronic ballast and lighting system |
DE102010011157A1 (en) | 2010-03-12 | 2011-09-15 | Vossloh-Schwabe Deutschland Gmbh | Operating apparatus for use as ballast in e.g. high-intensity discharge lamp in room for illumination purposes, has control device comprising control channel to control light source under consideration of control variables |
JP6096332B2 (en) * | 2013-11-25 | 2017-03-15 | フィリップス ライティング ホールディング ビー ヴィ | Method for controlling lighting device, lighting controller and lighting system |
CN110191551A (en) * | 2019-07-04 | 2019-08-30 | 苏州市职业大学 | A kind of mixed lighting control device and method |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020118538A1 (en) * | 2001-02-02 | 2002-08-29 | Calon Georges Marie | Integrated light source |
US20050067982A1 (en) * | 2003-09-29 | 2005-03-31 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Data converter for a lighting system, and method for operating a lighting system |
US20060007682A1 (en) * | 2004-07-12 | 2006-01-12 | Reiff David L Jr | Light fixture |
US20060007109A1 (en) * | 2004-06-21 | 2006-01-12 | Kazuto Noritake | Illumination device and method |
US7052157B1 (en) * | 2003-04-26 | 2006-05-30 | Lau Kenneth H | Multi-function luminaire |
US20060238136A1 (en) * | 2003-07-02 | 2006-10-26 | Johnson Iii H F | Lamp and bulb for illumination and ambiance lighting |
US7218056B1 (en) * | 2006-03-13 | 2007-05-15 | Ronald Paul Harwood | Lighting device with multiple power sources and multiple modes of operation |
US20080224635A1 (en) * | 2004-12-20 | 2008-09-18 | Outside In (Cambridge) Limited | Lighting Apparatus and Method |
US20080259596A1 (en) * | 2005-02-18 | 2008-10-23 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Color Adaptive Lighting System |
US7498753B2 (en) * | 2006-12-30 | 2009-03-03 | The Boeing Company | Color-compensating Fluorescent-LED hybrid lighting |
US7750582B2 (en) * | 2005-11-29 | 2010-07-06 | Sharp Kabushiki Kaisha | Liquid crystal display device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2146829Y (en) * | 1992-12-11 | 1993-11-17 | 康洪义 | Incandescent and fluorescent combined lamp |
JP2003133087A (en) | 2001-10-26 | 2003-05-09 | Matsushita Electric Works Ltd | Lighting system |
JP4544922B2 (en) | 2004-06-30 | 2010-09-15 | 三菱電機株式会社 | Lighting device |
CN1925715B (en) * | 2005-08-31 | 2011-05-18 | 东芝照明技术株式会社 | Bulb type fluorescent lamp apparatus |
-
2007
- 2007-03-22 DE DE102007013742A patent/DE102007013742A1/en not_active Withdrawn
-
2008
- 2008-02-26 KR KR1020097022104A patent/KR20090125835A/en active IP Right Grant
- 2008-02-26 WO PCT/EP2008/052290 patent/WO2008113658A1/en active Application Filing
- 2008-02-26 US US12/532,151 patent/US8502458B2/en not_active Expired - Fee Related
- 2008-02-26 CN CN2008800066694A patent/CN101622908B/en not_active Expired - Fee Related
- 2008-02-26 EP EP08717124A patent/EP2138012B8/en not_active Not-in-force
- 2008-02-26 JP JP2009553989A patent/JP5200036B2/en not_active Expired - Fee Related
- 2008-02-26 AT AT08717124T patent/ATE522120T1/en active
- 2008-03-17 TW TW097109292A patent/TWI446837B/en not_active IP Right Cessation
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020118538A1 (en) * | 2001-02-02 | 2002-08-29 | Calon Georges Marie | Integrated light source |
US7052157B1 (en) * | 2003-04-26 | 2006-05-30 | Lau Kenneth H | Multi-function luminaire |
US20060238136A1 (en) * | 2003-07-02 | 2006-10-26 | Johnson Iii H F | Lamp and bulb for illumination and ambiance lighting |
US20050067982A1 (en) * | 2003-09-29 | 2005-03-31 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Data converter for a lighting system, and method for operating a lighting system |
US20060007109A1 (en) * | 2004-06-21 | 2006-01-12 | Kazuto Noritake | Illumination device and method |
US20060007682A1 (en) * | 2004-07-12 | 2006-01-12 | Reiff David L Jr | Light fixture |
US20080224635A1 (en) * | 2004-12-20 | 2008-09-18 | Outside In (Cambridge) Limited | Lighting Apparatus and Method |
US20080259596A1 (en) * | 2005-02-18 | 2008-10-23 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Color Adaptive Lighting System |
US7750582B2 (en) * | 2005-11-29 | 2010-07-06 | Sharp Kabushiki Kaisha | Liquid crystal display device |
US7218056B1 (en) * | 2006-03-13 | 2007-05-15 | Ronald Paul Harwood | Lighting device with multiple power sources and multiple modes of operation |
US7498753B2 (en) * | 2006-12-30 | 2009-03-03 | The Boeing Company | Color-compensating Fluorescent-LED hybrid lighting |
Also Published As
Publication number | Publication date |
---|---|
US8502458B2 (en) | 2013-08-06 |
TW200904257A (en) | 2009-01-16 |
EP2138012A1 (en) | 2009-12-30 |
TWI446837B (en) | 2014-07-21 |
EP2138012B8 (en) | 2012-02-08 |
CN101622908B (en) | 2011-06-08 |
CN101622908A (en) | 2010-01-06 |
WO2008113658A1 (en) | 2008-09-25 |
KR20090125835A (en) | 2009-12-07 |
ATE522120T1 (en) | 2011-09-15 |
JP2010521790A (en) | 2010-06-24 |
EP2138012B1 (en) | 2011-08-24 |
JP5200036B2 (en) | 2013-05-15 |
DE102007013742A1 (en) | 2008-10-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9144131B2 (en) | Lighting control system and method | |
US10057952B2 (en) | Lighting apparatus using a non-linear current sensor and methods of operation thereof | |
US8988005B2 (en) | Illumination control through selective activation and de-activation of lighting elements | |
US8456109B1 (en) | Lighting system having a dimming color simulating an incandescent light | |
US7334917B2 (en) | Illumination device | |
KR100907300B1 (en) | Drive Circuit For Light Emitting Diode | |
US9474127B2 (en) | Lighting system and luminaire | |
US8581520B1 (en) | Lighting system having a dimming color simulating an incandescent light | |
TW200624706A (en) | Illumination source, illumination system, and dimming control method | |
US9756696B1 (en) | Configurable LED lighting apparatus | |
CN103052205A (en) | Lamp fitting | |
US8502458B2 (en) | Operating device and method for the combined operation of gas discharge lamps and semiconductor light sources | |
US11638340B2 (en) | Light sources that increase object chroma when dimmed | |
US20130278156A1 (en) | Light-emitting diode lighting apparatus, illuminating apparatus and illuminating method | |
WO2013173284A1 (en) | Lighting system having a dimming color simulating an incandescent light | |
WO2012164683A1 (en) | Illuminating apparatus and brightness control method | |
US20150319816A1 (en) | Single-wire dimming method | |
US11612029B2 (en) | Controllable lighting device | |
JP5563813B2 (en) | Light color variable lighting fixture | |
JP6934131B2 (en) | Lighting control device and lighting device | |
JP2010206085A (en) | Light emitting device, lighting system and method of driving the lighting system | |
KR101483229B1 (en) | Lighting system to control light color | |
WO2021089503A1 (en) | A light emitting diode, led, based lighting device arranged for emitting a particular emitted light following a planckian locus in a color space | |
KR20100115028A (en) | Lighting control apparatus and its method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG,GERMA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUBER, ANDREAS;MUDRA, THOMAS;SIGNING DATES FROM 20090728 TO 20090729;REEL/FRAME:023256/0309 Owner name: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG, GERM Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUBER, ANDREAS;MUDRA, THOMAS;SIGNING DATES FROM 20090728 TO 20090729;REEL/FRAME:023256/0309 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.) |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20170806 |